Business Combinations (Fair Values of the Business Combinations and Allocations for the Acquisitions Completed) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 03, 2022	Jan. 02, 2022
Business Acquisition [Line Items]
Goodwill	$ 7,367,284	$ 7,416,584
Fiscal Year 2022 Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	13,500
Fiscal Year 2021 Other Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	318,600
Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		1,128,584
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		0
Business Combination, Consideration Transferred, Liabilities Incurred		2,910
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value	(45,031)
Business Acquisition, Cost Of Acquired Entity, Working Capital Adjustments		(183)
Cash Acquired		(195,010)
Business Combination, Consideration Transferred		981,698
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		72,104
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		26,507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		15,564
Goodwill	550,023
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(86,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		(1,197)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		(4,628)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(61,960)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		981,698
Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		1,200,000
BioLegend [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		3,336,115
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		2,638,369
Business Combination, Consideration Transferred, Liabilities Incurred		6,857
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value		0
Business Acquisition, Cost Of Acquired Entity, Working Capital Adjustments		0
Cash Acquired		(292,377)
Business Combination, Consideration Transferred		5,688,964
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		184,704
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		147,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		9,330
Goodwill		3,510,710
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total		(668,920)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		(38,239)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		5,688,964
BioLegend [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		5,700,000
Oxford Immunotec [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		590,900
Nexcelom Bioscience [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		267,300
Core Technology [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	290,089
Core Technology [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		782,400
Trade Names [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	39,626
Trade Names [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		38,000
Customer Relationships [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	141,670
Customer Relationships [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		1,714,800
License | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0
License | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		8,979
Diagnostics [Member]
Business Acquisition [Line Items]
Goodwill	1,960,267	1,970,350
Discovery & Analytical Solutions [Member]
Business Acquisition [Line Items]
Goodwill	$ 5,407,017	$ 5,446,234